Hair follicles are small living units in outer layer, epidermis, of our skin that produce hair. Each hair follicle contains an oil gland, hair root and blood supply. A hair follicle always produces one shaft of hair. Hair follicle are very sensitive to our health conditions. They are fast growing cells after bone marrow in our body. A single hairfollicle on head usually produces one centimeter long hair each month that contains several thousands of hair cells. A hair is made up of keratin, a protein type. Hair follicles are shifted from donor parts to bald parts during hair transplant procedures. They have three phases regarding their growth, anagen, catagen and telogen.

Anemia problems caused by iron deficiency in the body, upper respiratory infections such as influenza, typhoid fever, pneumonia, blood cancer, diseases such as diabetes, disorders of the thyroid hormone can show the effect of hair loss in anyone without a gender distinction.

Pregnancy can cause conditions such as hair loss in women effectively lactation and childbirth. It is caused by hormonal imbalances in hormone secreted in this period and this period. Women are also to remain exposed to genetic hair loss, affected by hair loss due to these factors. The use of birth control pills also, as this will cause hormonal imbalances can cause hair loss.
Iron deficiency is the cause of hair loss.